Grating.



- STATES PATENT OFFICE.

. ISRAEL BENJAMINS,-F BnooKIlYN, NEW YORK, nssrenon TO MARK. & MOBIL, Inc, or

' BROOKLYN, new YORK, A FIRM.

(marine.

To all whom it mag coiwe m 1 Be it known that I, ISRAEL 'BENJAMINs, a

citizen. of the United States residing at 161 Divisionavenue, Brooklyn, in the countyof Kings and State of- New York, have 1nvented a new and useful Grating, of which a v the following is a specification.

guards for windows or openings 111 walls,

. openings in interiors of structures and for first, to produce a similar purposes; it conslsts in the novel features hereinafter more fully described and illustrated in the drawings.

- The objects of my improvement are: grating of great strength and durability With a minimum of expense of material and labor; second, to produce a grating of attractive appearance; third, to produce a grating, which is comparatively free from dirt'and obstructions accumulating in its passages and attain these objects by the grating, one form of which is illustrated in the accompanying drawings, in which Figure 1 is a plan; Fig. 2 is an or side view; Fig. 3"is an end view; Fig. 4 is an elevation of the detail 12; Fig. 5 is a plan or top view of the said detail 12; Fig. 6 is an elevation of the detail 13 in its original shape; Fig. 7is an end view of said detail 13; Fig. 8 shows a sectional view of details 12 and 13 in position and part of detail 11in elevation; Fig. 9 is an elevation of part of detail 11 showing clearly the form of slots punched or otherwise formed in it.

Similar letters and numerals refer to similar parts throughout the several views. .My grating as shown is formed of three sets of bars, as follows: 1. Longitudinal or bearer bars 11 having slots 15 and enlargeends;

ments 15 of the same slots near their lower 2. transverse or spacing bars 12 having notches l l and 14. in their upper edges, the depth of said notches being equal to the depth of the bridge-strips 16 ofthe bars 11, as shown; 3. key-bars'13, which are dethe shape 13 by pressure or tion.

To assemble the grating the bars 12 are first. passed through Specification of Letters Patent.

the structure rigid, the key-bars the entire between its bars. I 1

elevation the slots 1515 and Patented May 25, 1915.

- Application filed J'un 9, 1914. seriarno. 844,101.

' then raised vertically. until their notches 14 and l4 -will coincide with the bridge strips 16of the bars 11; the keybars 13 are then inserted into theenlargedslots 15 of bars 11 under the bars 12, and finally, to make 13 are pressed or hammered on the sides, thereby causing them to expand vertically and press.

against" the lower edges of bars 12 above them' and on the bottoms of the slots 15 in bars 11, thereby rendering the structure of rating tight and secure. The bars 13 of igs. 6 and 7 will in this way be deformed into a shape similar to that of 13 shown in Fig. 8. I Numerous modifications could be made in my grating without departing from the main scope of my invention.

Instead of being initially round as shown in the drawings the key-bars 13 may have any suitable cross-section in all cases, such as square, rectangular, hexagonal, semicircular and others. 4

The spacing bars 12 and slots 15-45 could also be varied in shape, if desired.

The key-bars could be placed in the side of the spacing bars, instead of being underneath the same, and the slots may then be formed accordingly.

I do not therefore restrict myself to the exact shape of my grating as shown in the drawing, nor to the exact shape of any of the details shown; but all mechanical equivalents and obvious modifications of the same.

What I claim as my invention and desire -to secure by Letters Patent is I 1. A grating comprising bearer bars having suitable slots, spacing bars passing through said slots, said keybars having portions, inclosed between said bearer bars, expanded in the direction 0 said spacing bars, thereby securing said spacing bars in position. g

2. A grating comprising bearer bars having suitable slots, spacing bars and keybars passing through said slots, said keybars being sltuated under said spacing bars, when the said grating is horlzontal, and having portions, inclosed between said bearer bars, expanded vertically, thereby securing said spacing bars in positlon.

bars and key- I intend to include 3. A grating comprising bearer bars,

and keybars, said bearer bars spacingbars enlarged at their lower ends,

having slots yvhen said grating is horizontal, said spacpassing through said slots, said keybars, be-

mg bars passing through the upper ends mg mltially round, having portions in- 1a of said slots, said keybars, being initially closed between said bearer bars expanded thicker than said spacing bars, passing in the direction of said spacing bars by 5 through said enlargements in said slots and compressing the suitable sides of said keyhaving portions, inclosed between said bars after the said spacing bars are in place,

bearer bars, expanded vertically by comthereby securing said spacing'bars in posi- 20 pressing the sides of said keybars after the tion. said spacing bars are in place, thereby se- 10 curing said spacing bars in position.

4. gratmg comprising bearer bars, 4 Witnesses:

spacing bars and keybars, said bearer bars I. S. I having slots, said spacing bars and keybars E. SHULMAND ISRAEL BENJAMINS/ 

